Machine for bending sheet-metal plates.



Patented Jan. '4, I902.

A. SWOBDDA &. H. ROTHE. MACHINE FDR SENDING SHEET METAL PLATES.

(Application filed Out. 11, 1901.)

(No Model.)

THE- Nonms FUSES co. PHDTO-LITNQ, wnsnmulom u. c.

No. 69l,205. Patented Ian. l4, I902.

A. SWUBGDA & H. HOTHE.

MACHINE FUR BENDING SHEET METAL PLATES.

(Application filed Oct. 11, 1901. (N0 Modal.) 5 Sheets-Sheet 2.

THE Norms PETERS co, PNOTOLITHOH WASHINGTON o. c.

Patented Ian. l4, I902.

A. SWOBODA &. H. BBTHE. MACHINE FUR BENDING SHEET METAL PLATES.

(Application filed Oct. 11, 190,1.)

, (No Model.)

Tn: Norm PETE c.

Patented an. l4, I902.

A. SWOBUDA & H. Roms. MACHINE FOR BENDING SHEET METAL PLATES.

(Application filed Oct. 11, 1901.) (No M0191.) 5 Sheets-Sheet 4.

Z 0 W M n a I. 4U 6 t n 3 a P .L H T 0 R H & A D 0 B 0 W S A 5 0 m 6 0 N MACHINE FOR BENDING SHEET METAL PLATES.

(Applicabion filed. Oct. 11, 1901.) (NufludeL) 5 Sheets-Sheet 5.

Wwdm

UNITED STATES ATENT MACHINE FOR BENDING SHEET-METAL PLATES.

SPEGIFIGATIQN forming part of Letters Patent No. 691 ,205, dated January 14, 1902.

Application filed October 11, 1901. Serial No. 78,286. (No model.)

To all whom it may concern:

Be it known that we, AUGUST SWOBODA and HERMANN ROTHE, subjects of the Emperor of Germany, and residents of the city of Berlin, Kingdom of Prussia, German Empire, have invented certain new and useful Improvementsin Machines for Bendingsheet- Metal Plates, of which the following is a full, clear, and exact description.

The present invention relates to a sheetmetal-bending machine, the object of which is to bend sheet-metal plates in two different directions.

The machine is principally adapted for the treatment of metal plates destined for use in the manufacture of cups or curved flanges for the bells or domes of gas-holders.

Various views and details of a form of construction of the machine are shown in the accompanying drawings, in which- Figure l is a frontelevation, and Fig. 2 a side elevation,of the complete machine. Fig. 3 is a section on line A B of Fig. 1. Fig. 4 is a plan. Fig. 5 is an elevation, and Fig. 6 a side or end view,of the upper roller of the machine. Fig. 7 is a plan view, Fig. 8 a section on line C D of Fig. 7, and Fig. 9 a side view, of the lower. roller of the machine. Fig. 10 is an elevation of the pressing and holding device for the plate to be bent. Fig. 11 is a perspective view, and Fig. 12 a, plan view, of a cup-plate for gas-holders. Fig. 13 shows the position of the rollers on the metal plate to be bent being introduced. Figs. 14 and 15 are sections on the lines E F and G H, respective1y,of Fig. 13. Fig. 16 shows the position of the rollers after the first operation. Figs. 17 and 18 are sections on lines I K and L M, respectively, of Fig. 16. Fig. 19 shows the position of the rollers after turning them for ninety degrees. Figs. 20 and 21 are sections on the lines N O and P Q, respectively, of Fig. 19. Fig. 22 shows the position of the rollers after turning them for one hundred and eighty degrees. Figs. 23 and 24 are sections on lines R S and T U, respectively, of Fig. 22.

The present machine consists, essentially, of two bending-blocks 2 and 3, termed rollers in this specification, which are suitably arranged in a frame 1, said rollers being of the shape shown in Figs. 4 to 9-that is to say, they are curved correspondingly to the radius of curvature it is desired to obtain. In the present form of construction the operation of the rollers 2 and 3 is effected by means of a hand-wheel 5, mounted on ashaft 4, the movement of said hand-Wheel being communicated to the toothed wheel 7 by the toothed wheel 6, mounted on the before-mentioned shaft 4 and gearing with said toothed wheel 7. The latter is mounted on the shaft 8, carrying the lower roller 3, and is provided at both ends with toothed wheels 9, gearing with correspondingly arranged toothed wheels 10, mounted on the shaft 11, which carries the upper roller 2. By revolving the hand-wheel 5 the rollers 2 and 3 can consequently be turned in the one or other direction in such a manner that the surfaces of the rollers are rolled upon one another, thus imparting to the metal plates arranged between them the curvatures corresponding to the shape of the rollers. The bearings 12 of the upper roller 2 are adjustable in vertical guides 13 by screws 14, attached to the bearings, said screws being guided in the cross-frames 15 by means of hand-wheels 16.

For pressing or holding the metal plate to be bent during the operation of'the rollers a pressure-bar 19 is used, the height of which is adjustable by means of screws 17 and the hand-wheels 18, arranged thereon, said bar being bent in a form corresponding to the profile of the lower roller 3. On the further end of the lower roller 3 an adj ustahle stopplate 20 is provided.

It is preferable to make the upper roller 2 solid, while the lower roller 3 is provided with hollow spaces 24, adapted to communicate with a channel 25 in the shaft 8 of the roller 3, so that the latter can be cooled as required by the introduction of water which is supplied to the shaft through the short tube 21. (Shown in Fig. 1.) The cooling-water passes out at the other end of the shaft 8 through the hose 22, fixed thereto. In case of need the arrangement may be so made that both rollers can be cooled during the bending operation.

For introducing the metal plate 23 to be bent into the machine the upper roller 2 is removed from the lower roller 3 by screwing the spindles 14 in an upward direction, and the pressure-bar 19 is also raised by screwing the spindles 17 also in an upward direction, so that the metal plate 23 can be introduced between the two rollers in the manner shown in Figs. 13 to .15 until it abuts against the stop-plate 20. If the roller 2 and the pressure-bar 19 are lowered by screwing down the spindles 14 and 17, respectively, the metal plate 23, which has been introduced between the two rollers 2 and3, preferablyin a heated condition, receives a curvature corresponding to the shape of the rollers, as shown in Figs. 10 and 16. In order to bend the plate 23 in the other direction, the rollers 2 and 3 are turned for one hundred and eighty degrees by revolving the hand-wheel 5 in the direction indicated by the arrow in Fig. 3, by which the surfaces of the rollers are caused to roll upon one another, thus imparting to the metal plate 23, placed between them, the curved form shown in Figs. 11 and 12. After having been turned ninety degrees the rollers 2 and 3 occupy the position shown in Figs. 19 to 21, while they occupy the position shown in Figs. 22 to 24 after having been turned for one hundred and eighty degrees. After returning the rollers 2 and 3 to their original position and disengaging the pressure-bar 19 the metal plate 23 thusgiven the desired curvature can be removed from the lower roller.

The present machine presents the .eX- tremely great advantage of enabling cupplates and the like to be bent in perfectly corresponding shape in two radii of curvature, while this work could hitherto only be accomplished by slow and difficult beating out of the plates. In treating metal plates by the present machine they can be introduced into the machine in a perforated condition, as shown in Figs. 11 and 12, since the operation of the machine is so exact that the holes in the plates to be fitted to each other fit exactly one to the other.

It is obvious that the constructional details of the machine described may be varied in many ways without departing from the spirit of this invention.

What we claim, and desire to secure by Letters Patent, is-

1. In a metal-plate-bending machine, two longitudinally-curved rollers, and the pressing and work-holding bar.

2. In a metal-plate-bending machine, two

longitudinally-curved rollers, one of said rollers being hollow to receive a cooling medium, and the pressing and work-holding bar.

3. In a metal-bending machine, the upper and lower curved rollers, gearconnections between the rollers, adjustable bearings for the upperroller, and the adjustable pressure-bar.

4. A machine for bending metal plates in two directions, comprising two rollers, the shape of which corresponds to the radii of ourvature it is desired to obtain, and a presserbar serving to hold the plate whereupon the bending of the plate arranged between the two rollers is effected in the other direction upon the turning of said rollers with relation to each other, substantially as specified.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, this 24th day of September, 1901.

AUGUST SVVOBODA. HERMANN ROTHE.

\Vitnesses:

HENRY HASPER, WoLDEMAR HAUPT. 

